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View Full Version : What gears to use....?



wickedcobra
10-09-07, 02:29 AM
Well I have made up my mind to go with a solid axle. What gears should I go with? I will go to the track occasionally, The car is not my DD. What do you guys think?

Lucafu1
10-09-07, 02:55 AM
3.73 will be good and still wont hurt you if you step up to a twin screw. i liked my 3.90s as well, if you plan on sticking with a ported blower then you may like them instead.

Ruckus46gt
10-09-07, 03:59 AM
4.10s if your going to run a 28" tall tire...3.73's for a 26" tall tire

Ethan@S3M
10-09-07, 10:29 AM
Just put 3.73's in with my straight axel. We have FRPP gears for 100.00 on clearence.

BurnTire
10-09-07, 11:05 AM
I have 3:73's in my setup.

It all depends on what your final trap speed is going to be and planned shift points. If you use 4:10s on a 28" tire and trap around 130MPH plan on the RPMs being around 6200. I base this on a 29" tire height due to the slick growing. When I went from a 26" to a 28" tire on my stock 3:55s it did not affect my ET in a negative manner.

The 3.90 gears have some history of breakage and whine so I would stay away from those.

Check out the gear calculators here.
http://www.highperformancestangs.com/index.php?page=calc

OH3MGSVT
10-09-07, 11:18 AM
I have 3:73's in my setup.

It all depends on what your final trap speed is going to be and planned shift points. If you use 4:10s on a 28" tire and trap around 130MPH plan on the RPMs being around 6200. I base this on a 29" tire height due to the slick growing. When I went from a 26" to a 28" tire on my stock 3:55s it did not affect my ET in a negative manner.

The 3.90 gears have some history of breakage and whine so I would stay away from those.

Check out the gear calculators here.
http://www.highperformancestangs.com/index.php?page=calc

You hear that Tony? 3.90's = bad lol. but back to the original thread, I think 3.73's will be fine, that's what I'll be going with when I get S/C

Jeremy
10-15-07, 04:48 PM
You hear that Tony? 3.90's = bad lol. but back to the original thread, I think 3.73's will be fine, that's what I'll be going with when I get S/C

Shananagins!!! I have them and the only problem is a wine. I believe that is because of how its setup. Im not all the easy on my cars either.:hi:

gip99gt
10-15-07, 05:11 PM
If you decide to stay N/A I would go 4.10's.

Ruckus46gt
10-15-07, 06:11 PM
If you decide to stay N/A I would go 4.10's.
think he has an 03/04 cobra but if he has a 99/01 and was staying n/a i would go 4.56, 4.30 at a min

4Jenna
10-15-07, 06:54 PM
Just put 3.73's in with my straight axel. We have FRPP gears for 100.00 on clearence.


WOW thats a great deal!:twothumbsup:

gip99gt
10-16-07, 12:21 PM
My bag I thought he had a GT. If he has a 99-01 Cobra than 4.30's or 4.56's. Depends on you.

wickedcobra
10-16-07, 04:37 PM
My bag I thought he had a GT. If he has a 99-01 Cobra than 4.30's or 4.56's. Depends on you.

None of the above. I have an 03 Cobra.

gip99gt
10-17-07, 11:16 AM
03 Cobra solid axles = 4.10's

AZSonicSnake
10-21-07, 07:07 PM
You hear that Tony? 3.90's = bad lol. but back to the original thread, I think 3.73's will be fine, that's what I'll be going with when I get S/C

haha. only complaint i have had is the whine. otherwise, the stock posi unit peaced out with the 3.90's in there.

BurnTire
10-21-07, 07:17 PM
I am actually happy how quiet my car is with solid bushings all around. I can't tell much difference from the IRS sound wise. So much for these so called experts who wished me good luck with the setup and said it would be noisy.